func Fuzz(data []byte) int {
cfg, err := jpeg.DecodeConfig(bytes.NewReader(data))
if err != nil {
return 0
}
if cfg.Width*cfg.Height > 1e6 {
return 0
}
img, err := jpeg.Decode(bytes.NewReader(data))
if err != nil {
return 0
}
for q := 0; q <= 100; q += 10 {
var w bytes.Buffer
err = jpeg.Encode(&w, img, &jpeg.Options{q})
if err != nil {
panic(err)
}
img1, err := jpeg.Decode(&w)
if err != nil {
panic(err)
}
if !reflect.DeepEqual(img.Bounds(), img1.Bounds()) {
panic("bounds changed")
}
}
return 1
}
func (c Creature) CropImage(width, height, max int, ctx appengine.Context) (image.Image, error) {
url, _ := aeimg.ServingURL(ctx, c.BlobKey, &aeimg.ServingURLOptions{Size: max, Crop: true})
client := urlfetch.Client(ctx)
resp, _ := client.Get(url.String())
// Just in case
if resp.StatusCode != 200 {
return nil, errors.New("Blob not found")
}
// Do we need further cropping?
if width == height {
return jpeg.Decode(resp.Body)
}
src, err := jpeg.Decode(resp.Body)
dest := image.NewRGBA(image.Rect(0, 0, width, height))
if err != nil {
return nil, err
}
graphics.Thumbnail(dest, src)
return dest, nil
}
// Test the delete function.
func TestDelete(t *testing.T) {
store := New()
// Add some images.
addA, _ := jpeg.Decode(base64.NewDecoder(base64.StdEncoding, strings.NewReader(imgA)))
addB, _ := jpeg.Decode(base64.NewDecoder(base64.StdEncoding, strings.NewReader(imgB)))
hashA, _ := CreateHash(addA)
hashB, _ := CreateHash(addB)
store.Add("imgA", hashA)
store.Add("imgB", hashB)
// Delete one.
store.Delete("imgA")
// Query should only return imgB.
query, _ := jpeg.Decode(base64.NewDecoder(base64.StdEncoding, strings.NewReader(imgC)))
queryHash, _ := CreateHash(query)
matches := store.Query(queryHash)
if len(matches) != 1 {
t.Errorf("Invalid query result set size, expected 1, is %d", len(matches))
return
}
if matches[0].ID != "imgB" {
t.Errorf("Query found %s but should have found imgB", matches[0].ID)
}
}
func main() {
f, err := os.Open("Lenna50.jpg")
if err != nil {
fmt.Println(err)
return
}
defer f.Close()
i50, err := jpeg.Decode(f)
if err != nil {
fmt.Println(err)
return
}
if f, err = os.Open("Lenna100.jpg"); err != nil {
fmt.Println(err)
return
}
defer f.Close()
i100, err := jpeg.Decode(f)
if err != nil {
fmt.Println(err)
return
}
if i50.ColorModel() != i100.ColorModel() {
fmt.Println("different color models")
return
}
b := i50.Bounds()
if !b.Eq(i100.Bounds()) {
fmt.Println("different image sizes")
return
}
var sum int64
for y := b.Min.Y; y < b.Max.Y; y++ {
for x := b.Min.X; x < b.Max.X; x++ {
r1, g1, b1, _ := i50.At(x, y).RGBA()
r2, g2, b2, _ := i100.At(x, y).RGBA()
if r1 > r2 {
sum += int64(r1 - r2)
} else {
sum += int64(r2 - r1)
}
if g1 > g2 {
sum += int64(g1 - g2)
} else {
sum += int64(g2 - g1)
}
if b1 > b2 {
sum += int64(b1 - b2)
} else {
sum += int64(b2 - b1)
}
}
}
nPixels := (b.Max.X - b.Min.X) * (b.Max.Y - b.Min.Y)
fmt.Printf("Image difference: %f%%\n",
float64(sum*100)/(float64(nPixels)*0xffff*3))
}
func main() {
op := gif.Options{256, nil, nil}
gifWriter, err := os.Create("new.gif")
if err != nil {
fmt.Println("something went wrong")
}
image1, _ := os.Open("image1.jpeg")
image2, _ := os.Open("image2.jpeg")
jpeg1, _ := jpeg.Decode(image1)
jpeg2, _ := jpeg.Decode(image2)
gif.Encode(gifWriter, jpeg1, &op)
gif.Encode(gifWriter, jpeg2, &op)
}
func loader(inChan chan loaderRequest, outChan chan *Image, errChan chan *Error, stopChan chan int) {
for {
select {
case req := <-inChan:
switch strings.ToLower(path.Ext(req.name)) {
case ".jpg":
if img, err := jpeg.Decode(req.reader); err == nil {
outChan <- &Image{Name: req.name, Data: img}
} else {
errChan <- &Error{Name: req.name, Message: err.Error()}
}
case ".png":
if img, err := png.Decode(req.reader); err == nil {
outChan <- &Image{Name: req.name, Data: img}
} else {
errChan <- &Error{Name: req.name, Message: err.Error()}
}
}
if err := req.reader.Close(); err != nil {
fmt.Errorf("%s\n", err)
}
case <-stopChan:
return
}
}
}
// decodeMJPEG turns gstreamer 'jpegenc' output into a stream of images.
func decodeMJPEG(input io.Reader) chan image.Image {
stream := make(chan image.Image)
go func() {
in := newReader(bufio.NewReaderSize(input, 64*1024*1024))
//in := newReader(input)
for {
printStats()
tDec.Start()
img, err := jpeg.Decode(in)
tDec.Stop()
//if *flagRec != "" {
// record(img)
//}
if err != nil {
if err.Error() == "unexpected EOF" {
close(stream)
}
if err.Error() != "invalid JPEG format: missing SOI marker" {
exit(err)
}
nErrors++
continue
}
select {
default:
nDropped++
case stream <- img:
nProcessed++
}
}
}()
return stream
}
func read(filename string) (image.Image, error) {
file, err := os.Open(filename)
if err != nil {
return nil, err
}
return jpeg.Decode(file)
}
func thumb() image.Image {
imageName := "test.jpg"
imageFile, err := os.Open(imageName)
if err != nil {
log.Fatal(err)
}
var myImage *image.Image
switch strings.ToLower(path.Ext(imageName)) {
case ".jpg", ".jpeg":
img, err := jpeg.Decode(imageFile)
if err != nil {
log.Fatal(err)
}
myImage = &img
case ".png":
img, err := png.Decode(imageFile)
if err != nil {
log.Fatal(err)
}
myImage = &img
}
imageFile.Close()
m := resize.Resize(0, 200, *myImage, resize.MitchellNetravali)
return m
}
// Decode reads a CR2 image from r and returns the embedded JPEG thumbnail as
// an image.Image.
func Decode(r io.Reader) (image.Image, error) {
r, err := NewReader(r)
if err != nil {
return nil, err
}
return jpeg.Decode(r)
}
func createSmallPic(file io.Reader, fileSmall string, w, h int) error {
// decode jpeg into image.Image
img, err := jpeg.Decode(file)
if err != nil {
return err
}
b := img.Bounds()
if w > b.Dx() {
w = b.Dx()
}
if h > b.Dy() {
h = b.Dy()
}
// resize to width 1000 using Lanczos resampling
// and preserve aspect ratio
m := resize.Resize(uint(w), uint(h), img, resize.Lanczos3)
out, err := os.Create(fileSmall)
if err != nil {
return err
}
defer out.Close()
// write new image to file
return jpeg.Encode(out, m, nil)
}
func ResizeImage(src, dst string) (err error) {
// open "test.jpg"
file, err := os.Open(src)
if err != nil {
// mlog.Error(err)
return err
}
defer file.Close()
// decode jpeg into image.Image
img, err := jpeg.Decode(file)
if err != nil {
// mlog.Error(err)
return err
}
// file.Close()
// resize to width 1000 using Lanczos resampling
// and preserve aspect ratio
m := resize.Resize(80, 0, img, resize.Lanczos3)
out, err := os.Create(dst)
if err != nil {
// mlog.Error(err)
return err
}
defer out.Close()
// write new image to file
return jpeg.Encode(out, m, nil)
}
//This private method provides decoding image
//Returns decoded image. If during decoding process occurred problem, return error
func decodingImage(data []byte) (image.Image, error) {
rimg, err := jpeg.Decode(bytes.NewReader(data))
if err != nil {
return nil, err
}
return rimg, nil
}
func main() {
var source string
flag.StringVar(&source, "source", "./test.jpg", "image to read")
var dest string
flag.StringVar(&dest, "dest", "./out.jpg", "image to output")
var sizeStr string
flag.StringVar(&sizeStr, "size", "100w", "size to resize to")
flag.Parse()
file, err := os.Open(source)
if err != nil {
log.Fatal(err)
}
defer file.Close()
// Decode the image.
m, err := jpeg.Decode(file)
if err != nil {
fmt.Printf("error decoding image\n")
log.Fatal(err)
}
outputImage := resize.Resize(m, sizeStr)
fl, err := os.OpenFile(dest, os.O_CREATE|os.O_RDWR, 0644)
if err != nil {
fmt.Println("couldn't write", err)
return
}
defer fl.Close()
jpeg.Encode(fl, outputImage, nil)
}
func openImage(t *testing.T, path string) image.Image {
fireTruck, err := os.Open(path)
assert.NoError(t, err, "error openenig image")
img, err := jpeg.Decode(fireTruck)
assert.NoError(t, err, "error decoding image")
return img
}
// Image returns an image object from the JPG.
func (r *Rep) Image() (image.Image, error) {
var buf bytes.Buffer
if c, err := buf.ReadFrom(r); err != nil || c == 0 {
return nil, err
}
return jpeg.Decode(&buf)
}
// Resize all images given to it
func resizeImages(path string, dim *Dimensions, progress chan int) {
file, err := os.Open(path)
if err != nil {
log.Fatal(err)
progress <- 1
return
}
img, err := jpeg.Decode(file)
file.Close()
if err != nil {
log.Fatal(err)
progress <- 1
return
}
res := resize.Resize(dim.height, dim.width, img, resize.Lanczos3)
out, err := os.Create(PutImagePath + strconv.FormatInt(rand.Int63(), 36) + ".jpg")
if err != nil {
log.Fatal(err)
progress <- 1
return
}
defer out.Close()
jpeg.Encode(out, res, nil)
progress <- 1
}
func main() {
doc := pdf.New()
canvas := doc.NewPage(pdf.USLetterWidth, pdf.USLetterHeight)
canvas.Translate(pdf.USLetterWidth/2, pdf.USLetterHeight/2)
f, err := os.Open("testdata/suzanne.jpg")
if err != nil {
fmt.Fprintln(os.Stderr, err)
os.Exit(1)
}
defer f.Close()
img, err := jpeg.Decode(f)
if err != nil {
fmt.Fprintln(os.Stderr, err)
os.Exit(1)
}
rect := &pdf.Rectangle{
pdf.Point{-100, -100}, // min
pdf.Point{100, 100}} // max
// draw an image
canvas.DrawImage(img, *rect)
canvas.Close()
err = doc.Encode(os.Stdout)
if err != nil {
fmt.Fprintln(os.Stderr, err)
os.Exit(1)
}
}
// Make thumbnail for the selected file
func MakeThumb(src string, dst_sane string, dst_thumb string) error {
file, err := os.Open(src)
defer file.Close()
if err != nil {
return err
}
img, err := jpeg.Decode(file)
if err != nil {
return err
}
sane := resize.Resize(1080, 0, img, resize.Bilinear)
out_sane, err := os.Create(dst_sane)
if err != nil {
return err
}
defer out_sane.Close()
jpeg.Encode(out_sane, sane, nil)
thumb := resize.Thumbnail(200, 200, img, resize.Bilinear)
out_thumb, err := os.Create(dst_thumb)
if err != nil {
return err
}
defer out_thumb.Close()
jpeg.Encode(out_thumb, thumb, nil)
return nil
}
func (c *appContext) uploadPic(a *multipart.FileHeader) (string, string) {
log.Println("In upload pic territory")
bucket := c.bucket
file, err := a.Open()
defer file.Close()
if err != nil {
panic(err.Error())
}
if err != nil {
panic(err)
}
buf, _ := ioutil.ReadAll(file)
fn := uuid.New()
fname := "places/" + fn + path.Ext(a.Filename)
thumbname := "placesthumb/" + fn + path.Ext(a.Filename)
log.Println(fname)
b := "http://s3-us-west-2.amazonaws.com/" + c.bucket.Name + "/" + fname
d := "http://s3-us-west-2.amazonaws.com/" + c.bucket.Name + "/" + thumbname
filetype := http.DetectContentType(buf)
err = bucket.Put(fname, buf, filetype, s3.PublicRead)
if err != nil {
log.Println("bucket put error for main image")
panic(err.Error())
}
log.Print("added a full image")
img, err := jpeg.Decode(bytes.NewReader(buf))
if err != nil {
log.Println(err.Error())
}
m := resize.Resize(200, 200, img, resize.Lanczos2)
buf2 := new(bytes.Buffer)
err = jpeg.Encode(buf2, m, nil)
if err != nil {
fmt.Println(err.Error())
}
thumb := buf2.Bytes()
filetype2 := http.DetectContentType(thumb)
err = bucket.Put(thumbname, thumb, filetype2, s3.PublicRead)
if err != nil {
log.Println("bucket put error for thumbnail")
panic(err.Error())
}
log.Println("uploaded one thumb image")
return b, d
}
//funcion resize imagen
func (u Util) ImgRZ(s string) {
//cargamos archivo de imageb jpg
file, err := os.Open("static/images/fotos_ori/" + s)
if err != nil {
log.Fatal("en este 1", err)
}
// decode jpeg image.Image
img, err := jpeg.Decode(file)
if err != nil {
log.Fatal("en este 2", err)
}
file.Close()
// resize to width 1000 using Lanczos resampling
// and preserve aspect ratio
m := resize.Resize(216, 162, img, resize.Lanczos3)
out, err := os.Create("static/images/fotos_rz/" + s)
if err != nil {
log.Fatal(err)
}
defer out.Close()
// write new image to file
jpeg.Encode(out, m, nil)
return
}
func (land Bounds) DoJob(backchan chan bool) {
file, err := os.Open(land.filename)
if err != nil {
panic(err.String())
}
defer file.Close()
img, err := jpeg.Decode(file)
if err != nil {
panic(err.String())
}
rgb := stripColors(img)
land.img = rgb
land.ExtractData()
land.SaveData()
/*f, err := os.Create(land.filename + "_stripped.png")
if err != nil {
panic(err.String())
}
defer f.Close()
err = png.Encode(f, land.img)
if err != nil {
panic(err.String())
}
*/
fmt.Printf("%s: got %d entries\n", land.outname, len(land.data))
backchan <- true
}
func main() {
if len(os.Args) != 2 {
fmt.Println("Please select one picture to makeascii...")
return
}
fileName := os.Args[1]
isJpeg, _ := regexp.MatchString(".+\\.jpg", fileName)
isPng, _ := regexp.MatchString(".+\\.png", fileName)
var picture image.Image
var imageErr error
fileIn, errIn := os.Open(fileName)
if errIn != nil {
fmt.Println(errIn.Error())
return
}
if isJpeg {
picture, imageErr = jpeg.Decode(fileIn)
} else if isPng {
picture, imageErr = png.Decode(fileIn)
} else {
fmt.Println("File type is not supported...")
return
}
if imageErr != nil {
fmt.Println(imageErr.Error())
return
}
fmt.Print(MakeAscii(GetImage(picture)))
}
func readImageJpeg(filename string) (image []Spectrum, width, height int) {
f, err := os.Open(filename)
defer f.Close()
if err != nil {
Error("Error reading JPEG \"%s\"", filename)
return nil, 0, 0
}
jpegImage, err := jpeg.Decode(f)
if err != nil {
Error("Error decoding JPEG \"%s\"", filename)
return nil, 0, 0
}
bounds := jpegImage.Bounds()
width = bounds.Dx()
height = bounds.Dy()
image = make([]Spectrum, width*height, width*height)
for y := 0; y < height; y++ {
for x := 0; x < width; x++ {
rb, gb, bb, _ := jpegImage.At(x, y).RGBA()
r := float64(rb) / float64(0xffff)
g := float64(gb) / float64(0xffff)
b := float64(bb) / float64(0xffff)
image[y*width+x] = *NewSpectrumRGB(r, g, b)
}
}
return image, width, height
}
func readImage(data []byte, format string) (image.Image, error) {
reader := bytes.NewReader(data)
if format == "png" {
return png.Decode(reader)
}
return jpeg.Decode(reader)
}
//截图生成文件
func resizeImage2file(src_img, dest_img string) {
file, err := os.Open(src_img)
if err != nil {
fmt.Println(err)
return
}
// decode jpeg into image.Image
img, err := jpeg.Decode(file)
if err != nil {
fmt.Println(err)
return
}
file.Close()
m := resize.Resize(0, 1000, img, resize.Lanczos2)
out, err := os.Create(dest_img)
if err != nil {
fmt.Println(err)
return
}
defer out.Close()
err = jpeg.Encode(out, m, nil)
if err != nil {
fmt.Println(err)
return
}
}
func main() {
// open "1.jpg"
file, err := os.Open("3.jpg")
if err != nil {
log.Fatal(err)
}
// decode jpeg into image.Image
img, err := jpeg.Decode(file)
if err != nil {
log.Fatal(err)
}
file.Close()
// resize to width 1000 using Lanczos resampling
// and preserve aspect ratio
m := resize.Resize(1, 0, img, resize.NearestNeighbor)
r, g, b, _ := m.At(0, 0).RGBA()
fmt.Printf("%X%X%X", r>>8, g>>8, b>>8) // removing 1 byte 9A16->9A
out, err := os.Create("test_resized3.jpg")
if err != nil {
log.Fatal(err)
}
defer out.Close()
// write new image to file
jpeg.Encode(out, m, nil)
}
func makeThumbnail(iname string) {
file, err := os.Open("photos/" + iname)
checkErr(err)
defer file.Close()
img, err := jpeg.Decode(file)
checkErr(err)
scale := 16
width, height := img.Bounds().Dx()/scale, img.Bounds().Dy()/scale
fimg := image.NewRGBA(image.Rect(0, 0, width, height))
for i := 0; i < width; i++ {
for j := 0; j < width; j++ {
fimg.Set(i, j, img.At(i*scale, j*scale))
}
}
outf, err := os.Create("thumbnails/thumbnail_" + strings.Split(iname, ".")[0] + ".png")
checkErr(err)
defer outf.Close()
err = png.Encode(outf, fimg)
checkErr(err)
}
// default image format: jpeg
func (this *Avatar) Encode(wr io.Writer, size int) (err error) {
var img image.Image
decodeImageFile := func(file string) (img image.Image, err error) {
fd, err := os.Open(file)
if err != nil {
return
}
defer fd.Close()
if img, err = jpeg.Decode(fd); err != nil {
fd.Seek(0, os.SEEK_SET)
img, err = png.Decode(fd)
}
return
}
imgPath := this.imagePath
if !this.HasCache() {
if this.AlterImage == "" {
return errors.New("request image failed, and no alt image offered")
}
imgPath = this.AlterImage
}
if img, err = decodeImageFile(imgPath); err != nil {
return
}
m := resize.Resize(uint(size), 0, img, resize.NearestNeighbor)
return jpeg.Encode(wr, m, nil)
}
func main() {
f, err := os.Open("../../images/78771293.jpg")
if err != nil {
log.Fatal(err)
}
defer f.Close()
img, err := jpeg.Decode(f)
if err != nil {
log.Fatal(err)
}
r, g, b, a := img.At(0, 0).RGBA()
fmt.Printf("%T %T %T %T \n", r, g, b, a) // uint32 uint32 uint32 uint32
fmt.Printf("%v %v %v %v \n", r, g, b, a) // 30884 27783 21662 65535
fmt.Printf("%d %d %d %d \n", r, g, b, a) // 30884 27783 21662 65535
fmt.Printf("%b %b %b %b \n", r, g, b, a) // 111100010100100 110110010000111 101010010011110 1111111111111111
fmt.Printf("%x %x %x %x \n", r, g, b, a) // 78a4 6c87 549e ffff
fi, _ := f.Stat()
fmt.Println(fi.Name())
fmt.Println(fi.Size())
fmt.Println(img.Bounds().Dx(), img.Bounds().Dy())
}